This group comprises plain and combined antihistamine preparations for systemic use. Antihistamines used in motion sickness are classified in this group. Other preparations used in motion sickness, see A04 - Antiemetics and antinauseants.

See also N07C - Antivertigo preparations.

Combined preparations (incl. combinations with hydroxyzine) are classified at separate 5th levels using the corresponding 50-series.

Combinations of antihistamines are classified at a separate 4th level, R06AK.

Antihistamines are also included in combined preparations classified in other groups:

Combinations with analgesics - N02

Combinations with xanthines - R03DA

Combinations with leukotriene receptor antagonists - R03DC.

Combinations with expectorants - R05C

Combinations with nasal decongestants for systemic use - R01B

Combinations with cough suppressants - R05D

Allergen extracts, see V01.

The group is subdivided according to chemical structure.

For some of the substances, different dosage forms are given different DDDs, due to differences in bioavailability.